The definition of regal is something related to or fit for a king or monarch.(adjective)
Dignified and princely behavior is an example of regal behavior.
See regal in Webster's New World College Dictionary
Origin: ME < MFr or L: MFr regal < L regalis < rex (gen. regis), a king, akin to regere, to rule: see right
See regal in American Heritage Dictionary 4
Origin: Middle English
Origin: , from Old French
Origin: , from Latin rēgālis
Origin: , from rēx, rēg-, king; see reg- in Indo-European roots.
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